AC/DC 0–1000V Voltage Measurement

The QD-21U AC/DC voltage transmitter is engineered to deliver highly adaptable voltage monitoring for complex automation environments, supporting measurements up to 1000V. By offering seamless compatibility with both AC and DC voltage signal conversion, this module provides a unified monitoring solution for diverse cabinet circuits. Traditionally, industrial control panels require separate mechanical and electronic solutions for alternating-voltage feeders and direct-voltage buses, which complicates panel design and increases component inventory. The QD-21U eliminates this inefficiency. Whether applied to AC power distribution networks or DC motor drive buses, it converts both signal types into standard outputs reliably.

Compact Design for Multi-point Installation

Designed with a highly compact DIN rail body, the QD-21U voltage transmitter is specifically optimized for centralized, multi-point voltage monitoring applications. In modern industrial control cabinets, space is a premium asset. When multiple circuits require separate voltage feedback, traditional bulky transmitters can quickly consume available rail space, forcing engineers to specify larger, more expensive enclosures. The QD-21U addresses this challenge with its slim, aligned modular layout. Several units can be installed side by side seamlessly, allowing for high-density monitoring without overcrowding the DIN rail. This thoughtful form factor keeps input and output wiring neatly organized a

Clear Status Indication

To maximize operational efficiency during both commissioning and long-term maintenance, the QD-21U voltage transmitter features a clear, localized status indication directly on the module body. In complex, multi-point voltage-monitoring systems, identifying the operational state of individual components can be a time-consuming process. This visual confirmation allows field technicians and maintenance personnel to instantly verify whether a specific unit is properly powered and functioning before resorting to individual signal loop testing with external meters. Such immediate, at-a-glance feedback drastically reduces unnecessary wire tracing and significantly accelerates routine cabinet inspections.